CBSE Class 9 Science Cell: The Building Block of Life (Class 9 NCERT New) Quiz 9

1. When a plant cell loses water in a concentrated sugar solution, why does it maintain its overall outer shape?

A The plasma membrane solidifies. B The rigid cell wall maintains the shape. C The nucleus expands. D Vacuoles take up air.

2. What is the phenomenon where the inner contents of a plant cell shrink away from its cell wall due to water loss?

A Cytolysis B Plasmolysis C De-plasmolysis D Endosmosis

3. Which common dye stain is used to prepare temporary slides of onion peels in school labs?

A Methylene blue B Safranin C Iodine crystal D Acetocarmine

4. Which dye stain is typically used for coloring human cheek cell preparations for observation?

A Safranin B Methylene blue C Crystal violet D Eosin

5. Under a microscope, onion peel cells look regularly arranged and box-shaped, while human cheek cells appear:

A Perfectly circular B Irregularly arranged C Long and thread-like D Star-shaped

6. What are the three basic structural components found in most eukaryotic cells?

A Plasma membrane, cytoplasm, and a prominent nucleus B Cell wall, capsule, and nucleoid C Flagella, cilia, and ribosomes D Mitochondria, lysosome, and chloroplast

7. What are the specialized sub-cellular structures suspended within the cytoplasm called?

A Tissues B Organelles C Inclusions D Molecules

8. What does the term "prokaryotic" literally mean based on its Greek roots?

A True nucleus B Primitive nucleus C Multi-nucleus D No nucleus

9. Which type of cell lacks a well-defined nuclear membrane and membrane-bound organelles?

A Plant cell B Animal cell C Prokaryotic cell D Fungal cell

10. What does the term "eukaryotic" mean based on its Greek roots?

A Without nucleus B True nucleus C Small nucleus D False nucleus